色多多在线观看播放-色多多在线观看高清免费-色多多在线观看视频-色多多在线看-欧美aaaaa性bbbbb小妇-欧美aaaav免费大片

The computing scientist's main challenge is not to get confused by the complexities of his own making.

I don't play for the records. I play because I love the game.

思考是最困難的工作，這也是為什么很少有人這么做。